A vibrant cartoon with colours and smooth animation. Create a 60-second vertical 9:16 animated cartoon story called "The Little Puppy Who Never Gave Up." Main character: Rocky, a small adorable brown puppy with floppy ears, large expressive dark eyes, a tiny black nose, soft fluffy brown fur, wearing a simple blue T-shirt. Keep Rocky's appearance exactly the same throughout the entire video. Story: Rocky wants to buy a cake for his best friend Milo, but he has no money. He decides not to give up. He helps a friendly bakery shopkeeper by carrying boxes, sweeping the floor and cleaning the bakery. He earns his first coin but still doesn't have enough money. Then a customer's shopping bag is blown away by the wind toward a puddle. Rocky runs after it and saves the bag. The shopkeeper sees Rocky's hard work and kindness and gives him the remaining money. Rocky buys the cake and gives it to his best friend Milo, a small white-and-black puppy with floppy ears and a red collar. Milo becomes very happy. They share the cake together. Style: cute colorful high-quality 3D animated cartoon movie, cinematic lighting, expressive faces, wholesome family-friendly emotional storytelling. Add gentle emotional background music, natural cartoon sound effects, and a warm English narration. Make the ending heartwarming. Final message: Never give up. Hard work and kindness matter.